Unit 5 Revealing Nature Using Language Grammar 教学设计 2022-2023学年外研版（2019）高中英语选择性必修第一册

Unit5 Revealing Nature Using Language：Grammar Past perfect 教学设计 教学目标 By the end of this lesson，students are able to： 1. Know the structure of the past perfect tense; 2. Know the usage of this tense； 3. Know how to solve the problems of past perfect. 教学重难点 Important point：the structure and the usage of past perfect. Difficult point：how to use this tense to solve the problems. 教学过程 Step 1.Lead in:a guessing game Ask two students to compete with each other,pick out the sentences which are used past perfect. Then ask students to conclude the structure of past perfect. 肯定式：had done 否定式：had not done Step 2.the usage of the tense Give students two sentences of each usage,then students get the points together. ①Before we got to the train station, the train had already left. 我们到达火车站之前，火车就已经离开了。 ②Before I could say “thank you”, he had run away. 我还没来得及说谢谢，他就跑开了。 Conclusion:表示在过去的某一时间或某一动作之前完成的动作或存在的状态。 ① By the end of last term, we had learnt 2,000 English words. 到上学期期末为止，我们已经学习了2,000个英语单词了。 ②They had lived there for ten years by then. 到那时为止，他们已经在那里住了10年了。 Conclusion: 表示从过去某一时间开始，一直延续到过去的另一个时间的动作，常用的时间状语有be then, by the end of, by the time. Give students a timeline of past perfect to help understand the tense. Step3. some fixed sentences pattern of this tense ①在“hardly...when/ no sooner...than/ scarcely...when”句型中,主句用过去完成时，从句用一般过去时。 Eg. I had no sooner reached home than it began to rain. ＝No sooner had I reached home than it began to rain. 我刚到家就开始下雨了。(注意:部分倒装） ②It was＋一段时间＋since从句(从句用过去完成时） Eg.It was at least three months since I had left Beijing. 我离开北京至少有3个月了。 ③It was the first/second/...time＋(that)从句(从句用过去完成时) Eg.It was the first time that I had chatted online in English. 那是我第一次用英语在网上聊天。 Step4：give students a learning tip 正确运用过去完成时的关键是要正确理解“过去的过去”。“过去的过去”是一个相对的时间，即它是相对于一个过去的时间而言的。这种相对的“过去的过去”有时通过时间状语体现出来，有时则可能是通过上下文来体现。结合题干中的语境来判断两个过去的动作发生的先后顺序，较早发生的那个动作用过去完成时。 Step5：do some exercise 1.He _____________(learn) 30